Air conditioner



FIG. 1 is a top, front, right-side perspective view of an air conditioner showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof; and,

FIG. 6 is a top plan view theroef with the control panel door closed. 

The ornamental design for an air conditioner, as shown. 